New setting to lower #PMS items to cache

- Should fix #91

resources/language/English/strings.xml

@@ -422,6 +422,7 @@
     <string id="39072">Is your Kodi installed on a low-powered device like a Raspberry Pi? If yes, then we will reduce the strain on Kodi to prevent it from crashing.</string>
     <string id="39073">Appearance Tweaks</string>
     <string id="39074">TV Shows</string>
+    <string id="39075">Number of PMS responses to cache</string>
 
     <!-- Plex Entrypoint.py -->
     <string id="39200">Log-out Plex Home User </string>

resources/language/German/strings.xml

@@ -360,6 +360,7 @@
     <string id="39072">Läuft Kodi auf einem Raspberry Pi oder ähnlichem Gerät mit äusserst wenig Rechenleistung? Falls ja, wird die Rechenlast reduziert, damit Kodi nicht abstürzt.</string>
     <string id="39073">Tweaks Aussehen</string>
     <string id="39074">TV Serien</string>
+    <string id="39075">Anzahl PMS Antworten zum Cachen</string>
 
     <!-- Plex Entrypoint.py -->
     <string id="39200">Plex Home Benutzer abmelden: </string>

resources/lib/librarysync.py

@@ -832,7 +832,8 @@ class LibrarySync(Thread):
         # Initiate threads
         self.logMsg("Starting sync threads", 1)
         getMetadataQueue = Queue.Queue()
-        processMetadataQueue = Queue.Queue(maxsize=100)
+        processMetadataQueue = Queue.Queue(
+            maxsize=int(utils.settings('xmlCacheLimit')))
         getMetadataLock = Lock()
         processMetadataLock = Lock()
         # To keep track

resources/settings.xml

@@ -40,6 +40,7 @@
 		<setting id="limitindex" type="number" label="30515" default="200" option="int" /><!-- Maximum items to request from the server at once -->
 		<setting id="enableTextureCache" label="30512"  type="bool" default="true" /> <!-- Force Artwork Caching -->
         <setting id="imageCacheLimit" type="enum" label="30513" values="Disabled|5|10|15|20|25" default="5" visible="eq(-1,true)" subsetting="true" /> <!-- Limit artwork cache threads -->
+        <setting id="xmlCacheLimit" type="slider" label="39075" default="100" option="int" range="10,10,200" visible="true"/>
 		<setting id="serverSync" type="bool" label="30514" default="true" visible="false"/><!-- Enable fast startup (requires server plugin) -->
 
 		<setting type="lsep" label="39052" /><!-- Background Sync -->